Increasing Productivity Through Performance Appraisal/Assessing Performance AppraisalIncreasing Productivity Through Performance Appraisal, by Latham Gary P. Wexley Kenneth N.. Reading, Mass.: Addison-Wesley, 1981, $6.95 paper.Assessing Performance Appraisal by Sashkin Marshall. San Diego, Cal.: University Associates, 1981, $17 paper.